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Subject: 
Re: High Strength Powered Steerable pivot wheel
Newsgroups: 
lugnet.robotics
Date: 
Mon, 21 May 2001 18:47:49 GMT
Viewed: 
839 times
  
The problem appears to be leverage.  I have no exposed shaft at all.  But
the force while climbing stairs still managed to snap the axle at the pivot
point.  I was suprised the axle broke and the retainers did not just pop off.

A steerable shrimp is a challenge.  Keeping the structure strong is a
continual challenge.  Also the number of motors keeps things interesting
also.  I have not figured out that part yet.  I need at least one more
output than I have.  I will research motor controllers shortly.

In lugnet.robotics, Mario Ferrari writes:
Did you try and connect the axle in two points at some studs of distance (in
height)? This should make the joint more robust and reduce the torsion in
the connection point.

Mario



Message has 1 Reply:
  SHRIMP building was: Re: High Strength Powered Steerable pivot wheel
 
(...) In the near term, I've opted out of the "steer in place" requirement. That way I go from four outputs to two. With an 8-wheel SHRIMP, I steer like a four-wheel steered (FWS) car does at low speed. Also, I don't have to worry about the friction (...) (24 years ago, 21-May-01, to lugnet.robotics)

Message is in Reply To:
  Re: High Strength Powered Steerable pivot wheel
 
(...) I think that no current set includes them. But it's available as spare part in the Pitsco/DACTAcatalog (US only). (...) This is actually the same solution I was thinking to implement: steerable front and rear wheels and side wheels driven like (...) (24 years ago, 21-May-01, to lugnet.robotics)

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